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Deep X-ray Observations of PSR J1119-6127: Do High- B Pulsars Born with Massive Progenitors?

Deep X-ray Observations of PSR J1119-6127: Do High- B Pulsars Born with Massive Progenitors?. Stephen C.-Y. Ng (HKU) Collaborators: V. M. Kaspi (McGill), W. G. G. Ho (Southampton), P. Weltevrede ( Jodrell Bank), S. Bogdanov (Columbia), R. Shannon (ATNF), & M. E. Gonzalez (UBC).

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Deep X-ray Observations of PSR J1119-6127: Do High- B Pulsars Born with Massive Progenitors?

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  1. Deep X-ray Observations of PSR J1119-6127: Do High-B Pulsars Born with Massive Progenitors? Stephen C.-Y. Ng (HKU) Collaborators:V. M. Kaspi (McGill), W. G. G. Ho (Southampton),P. Weltevrede (Jodrell Bank), S. Bogdanov (Columbia), R. Shannon (ATNF), & M. E. Gonzalez (UBC) Stephen Ng

  2. Pulsar P−Ṗ Diagram ATNF NASA/CXC Stephen Ng

  3. Pulsar P−Ṗ Diagram ATNF NASA/CXC Stephen Ng

  4. High-B Radio Pulsars • Comparable spin-down-inferred B-fields as magnetars • But similar properties as normal radio pulsars • Radio to -ray pulsations • Rotation-powered • Transition objects, key to understand magnetars • see Ng & Kaspi (2011) for a review Stephen Ng

  5. High-B Radio Pulsars Stephen Ng

  6. PSR J11196127 / G292.20.5 XMM-Newton 100ks • d= 8.4 kpc • B = 4.11013G • age = 1.7 kyr 10 Stephen Ng Ng et al. (2012)

  7. PSR J11196127 / G292.20.5 XMM-Newton 100ks XMM-Newton 100ks • d = 8.4 kpc • B = 4.11013G • age = 1.7 kyr 10 Stephen Ng Ng et al. (2012)

  8. Blackbody Temperature • Hottest among all known radio pulsars! • But R = 3km Stephen Ng Ng et al. (2012)

  9. Blackbody Temperature • Hottest among all known radio pulsars! • But R = 3km • Pulsations below 2.5keV thermal origin 0.5-2.5keV 2.5-10keV Stephen Ng Ng et al. (2012)

  10. Radio-X-ray Alignment J1819-1458 J1718-3718 McLaughlin et al. (2007) Zhu et al. (2011) Stephen Ng

  11. Blackbody Temperature • Polar-cap heating? (unlikely) • Magnetically channeled fallbackmaterial? • Anisotropic heat conduction? • Non-uniform heating from B-field decay? Stephen Ng

  12. PSR J11196127 / G292.20.5 XMM-Newton 100ks • R = 21 pc • age =1.7 kyr • v = 1.2104 km/s = 0.04 c ! 21pc 10 Stephen Ng Ng et al. (2012)

  13. PSR J11196127 / G292.20.5 XMM-Newton 100ks • R = 21 pc • age =1.7 kyr • v = 1.2104 km/s = 0.04 c ! 10 Stephen Ng Ng et al. (2012)

  14. Progenitor • Supernova explosion in a cavity: • SN Type Ib/c • Wolf–Rayet progenitor ( >30M) • Similar to other high B-field pulsars: • J18460258 / Kes 75 (Morton et al. 2007) • B150958 / MSH 1552(Gaensler et al. 1999) • also magnetars • Massive progenitors  higher B-field pulsars? • Fossil B-field? • Initial spin? NASA/CXC/CfA/P.Slane et al. Stephen Ng

  15. Massive Progenitors Stephen Ng Chevalier (2010)

  16. Massive Progenitors • All 3 high-B radio pulsars found in supernova remnants seem to have massive progenitors • Higher surface field for massive stars? (e.g. Petit et al. 2008) • Rapidly spinning core => effective dynamo? • Origin of magnetars? Stephen Ng

  17. Summary • High-B radio pulsars in X-rays: • thermal spectrum • single-peaked pulsed profile aligned with radio pulse => Magnetic field effects on heating / heat transport • Connection with massive progenitors Stephen Ng

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